Oil-fuel burner for use in furnaces, boilers, and the like



Jan. 22 1924.

J. DAvlEs OIL FUEL BURNER FOR USE IN FURNACES,

BOILERS, AND THE LIKE Filed May 1l //V VE/vToR:

Patented Jan. 22, 1924i.

` NETE@ STATES param orrlcE.

JOHN DAVIES, F DARLINGTON, ENGLAND, ASSIGNOR TO THE DAVIES FUEL BURN- ERS LIMITED, 0F STOCKTON-ON-TEES, DURI-IAM, ENGLAND.

OIL-FUEL BURNER FOR USE IN FURFNACES, BOILERS, AND THE LIKE.

Application led May 11, 1922. Serial No. 559,995.

To a'ZZ whom Z may concern:

l Be it known that I, JOHN Devine, of

Marlborough House, The Mead, Darlington,

in the county of Durham, England, engineer, a subject yof the King of Great Britain and Ireland-have invented a certain new and useful Improved Oil-Fuel Burner for Use in Furnaces, Boilers, and the like, of which' the following is a specification.

This' invention relates to oil fuel burners for use in furnaces, boilers and the like.

The object of this invention is to provide an improved oil fuel burner in which the oil fuel is more completely atomized than l5 has previously been the case.

An oil fuel burner for use in furnaces or the like madel in accordance with this invention is characterized in that it is provided with an annular jet of fuel, a forcing and atomizing jet within the said annular fuel jet, and a second atomizing jet under pressure surrounding the said annular fuel jet.

In the preferred form the improved burner comprises a tubular casing having an orifice at one end to form a nozzle and containing two tubes concentric with each other and with the tubular casing adapted to form a passage between said tubes, and another passage between the outer tube and the casing, means for supplying oil to the passage between the concentric tubes, means for supplying compressed air, steam or the like to the passage between the outer tube and the casing, means for supplying compressed air, steam or the like to the interior of the central tube, means to ensure that the air or the like in the passage between the casing and the outer concentric tube issues from said passage at the nozzle in a jet at right angles to the axis of said tube and casing, means to ensure that the air or the like in the central tube issues from said tube at the nozzle in an annular jet at an angle inclined from the axis of said tube to meet the outer jet of air at an obtuse angle, means to ensure that the oil in the passage between the two concentric tubes issues from said passage in an annular jet between the two jets of air, steam or the like so as to .be atomized, means for providing a supply of air or steam to the oil before it reaches the nozzle to partially break up or gasify said oil, and means for regulating the supply of oil at the nozzle.

The preferred form of. oil fuel burner the passage g between the concentric tubes c f and d to the nozzle. The casing a also contains an annular chamber la to whichI compressed air, steam orv the like is admitted by the supply pipe i. The nozzle ends of the tubes c and Z are provided with hollow cones c and oZ respectively. The compressed air in the chamber Zz, passes through the vents to the annular passage 7c between the tube c and the casing a and impinges on the flat inner surface of the cap a being diverted at right angles to the axis of the casing through the space between the cap and the end of the cone c. A solid cone Z is litted in the end of the tube d inside the hollow cone eZ. Compressed air, steam or the like is supplied to the inte-rior m of the tube Z through a suitable connection on the end d2. rlhe compressed air, steam or the like passes through the vents Z in the baseof the cone Z and issues in an annular jet between the cone Z and hollow cone oZ said jet being in-y clined from the axis of the tube CZ, the inclined faces of the cones effecting this inclination of the jet so that it meets the jet of air from the passage 7c at an obtuse angle. rlhe oil from the passage g issues between the cones c and d to the point of contact of the two jets of air, steam or the like, being drawn along the passage g by the suction of said jets.

The oil is completely atomized by reason of the air or steam jet issuing from the passage m, cutting the air jet from the passage 7c at an obtuse angle at the point of contact of the jets of air and oil. The atomized oil then issues in a jet through the orifice ZJ in the cap c and takes the general direction of the jet of air, steam or the like from the passage m. Air or steam from the passage m may issue through vents n in the tube d to the passage g so that the oil contained therein may be partially atomized before reaching the nozzle. Leakage of oil from the chamber e is prevented by a stufling box o and gland p, and packing g. A boss r is screwed on to the end of the tube (Z and is keyed to a lmnd-wheel s, being provided with a flange yr abutting against the gland p. Lateral movement of the boss and handwheel is prevented by a cap t enclosing the flange r. Nhen the hand-wheel and boss are revolved the tube CZ is advanced towards or receded from the nozzle so that the size of the passage between the cones c and d is regulated for the supply of oil to the nozzle. The inner face of the cone c forms a seat for the cone CZ so that the passage may be entirely closed if necessary.

lVhat I claim and desire lto secure by Letters Patent is l. Improved oil fuel burner for furnaces of various kinds utilizing liquid fuel comprising a medial tubular casing with a nozzle projecting an annular jet of fuel, an inner tubular casing concentric thereto, a passage between said medial tubular casing and said inner tubular casing, an outer tubular casing concentric with the before-mentioned medial tubular casing and a passage between said outer tubular casing and said medial tubular casing and means for supplying compressed air to a passage between the said inner tubular casing and said medial tubular casing and means for ensuring that the air, steam in the passage between the medial. tubular casing and the' inner tubular casing issues at the nozzle in an annular et at an angle inclined from the axis of the said tubular casing to meet the outer jet of air at an obtuse angle.

2. Improved oil fuel burner for furnaces of various kinds utilizing liquid fuel comprising a tubular casing having a cap and an orifice at one end to form a nozzle and containing two tubes concentric with each other and with the tubular casing, an annular chamber to which oil is fed through a supply pipe, an annular chamber to which compressed air is admitted by a supply pipe, hollow cones to the nozzle ends of the concentric tubes, a solid cone fitted in the end of the tube inside the hollow cone, means for preventing leakage of oil and means for regulating the supply of oil to the nozzle;

In testimony whereof I have signed my name to this specification.

JOHN DAVIES. 

